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Jan. 28, 1930. A. M. MITCHELL CHARCOAL BURNER 2 Sheets-Sheet 1 Filed 001:. 15, 1928' T A CW I INVZENIOP. ALLAN.M.MITGHELL nw/mwm FIG. I

Jan. 28, 1930. A, M. MITCHELL ,7

CHARCOAL BURNER Filjed Oct. 15, 928 2 Shee ts-Sheet 2 INVENIOR ALLAN.M.MITCHELL Patented Jan. 28, 1930 PATENT OFFICE ALLAN M. MITCHELL, OF MONTREAL, QUEBEC, CANADA CHARCOAL BURNER Application filed October 15, 1928, Serial No. 312,638, and in Canada August 31, 1928.

This invention relates to new and useful improvements in charcoal burners, heaters and the like and the object of the invention is to provide a heater which will be easily controlled and in which a perfect circulation of air will be maintained. I

Another object is to provide a heater in which fuel will be fed to the fire pot by gravity and perfect control of the feed will he 0 obtained.

A further object is toprovide a heater of robust construction which may he quickly and easily repaired.

According to my invention I provide a heater having a fuel feeding magazine and means for controlling the feed therefrom on to a suspended grate. Battles are provided within the heater to retard the passage of air therethrough so that it will be thoroughly heated before passing to the atmosphere.

In the drawings which illustrate my invention Figure 1 is a side elevation showing partly in section, my improved charcoal burner.

Figure 2 is a plan of the top of the burner.

Referring more particularly to the drawings, 11 designates the outside shell which is of cylindrical form having horizontal corrugations in its upper portion. The shell is provided with a top 12 having a central flanged recess 13 of conical form adapted to receive a dished cover 14. The outside edges 1.5 of the cover may rest on the edge of the top 12. The wall 15 of the cover is made with two different slopes so that the cover makes line contact with the walls of the recess 13 and forms an air tight joint. The cover held in the closed position by means of the locking levers 16 and 17. One end of of the lever 17 has a flanged portion adapted to contact with the lever 16 and limit the closing movement of the locking levers and 0 the lever 16 is pivotally secured by a bolt 18 to the centre of lever 17 while the other end- The lso to pr ide a fi ger hold on th e er- T l prevent the levers from becoming detached from the top, a chain 26 is provided with one end secured to the lever 17 and the other end secured to a lug 27 on the top 12. To facilitate handling of the heater as a whole, a bail 28 is provided pivotally attached at each end to brackets 29 secured to the side of the shell. Anchor chains 30 secured to suitable brackets 31 areprovided to hold the stove in position. Handles 32 are secured to shackles 83 which form the end links of the anchor chains. The magazine or fuel storage chamber 34 is provided at the top of the shell and has a frusto-conically shaped bottom 35. Se cured by flanges 36 to the edge .37 of the bottom is the tubular guide 38. The feed of the fuel from the chamber to guide is controlled by a sliding valve 39 which is operated by a handle 40 passing through suitable slots 41 and 42 formed in the chamber bottom and shell respectively. Secured to and extending upwardly and outwardly from the bottom edge of the guide is the bafiie 43 having a horizontally disposed flange 44, the edge 45 of which is spaced from the inner wall of the shell.

Brackets 46 are secured to the shell and extend upwardly towards the baffle 43 and then along said baflie terminating in a foot 47 to which is secured the perforated upper grate member 49 which is of frusto-conical form. A baffle plate 50 is secured to said brackets 46. The upper edge of plate 50 is spaced from the baffle 43. Brackets 51 extend outwardly from the lower edge of the member 49 for the bolts 52 which hold in suspension the lower grate 58 which is per forated and of conical form. The bolts 52 pass through the flange 54 of the grate. A perforated the box wall 55 rests in a groove 56 formed in the flange 54 and is pulled against the lower edge of the member 49 by means of the bolts 52. A lighting tray 57 is positioned below the grate and is supported on a bracket 58 extending outwardly from the shell. The fire door 59 is slidably mounted in guides 60 and downward movement of the door is limited by the cross bar 61 which is provided with looking lugs 62 which eng ge with the hoo d end 63 of he atch (it secured to the door. A flanged bottom plate is positioned at the bottom level of the door opening to allow ash to easily be drawn through the said opening. Secured to the bottom plate and extending upwardly therefrom is the inverted frusto-conically shaped guide plate 66, the upper edge 67 of which is secured to the shell at a point in proximity to the level of the middle of the fire pot. Pcrforations 68 are formed in the bottom plate between the lower edge of the guide plate and the shell and perforations 69 are also formed in the guide plate near its upper edge 70. The shell is perforated below the bottom plate as shown at 71 and hot air holes 72 are formed in the shell near the top of the chamber, 73. To protect the floor, an asbestos or like insulating disc 74 is positioned below the perforations 68 and rests on the edge 75 of the base ring 76 which is provided with feet 77 which raise the lower edge of the shell clear of the floor.

In operation, charcoal is placed in the magamine and is fed through the guide tube on to the grate which is of conical form being surrounded by a circular perforated wall and a frusto-conical top which allows the maximum of heating surface for the air which passes through the shell below the bottom and out through the top near the top of the air chamber above the grate. The air passes over air guide plates and against the bafiie date which directs it towards the air chamer. The fuel feed is controlled by a bafiie situated at the top of the guide tube. Easy access to the fire pot or grate is obtained through the sliding door in the front of the heater. The lower grate being suspended on bolts, is very easily removed for inspection and repairs. The magazine is sealed by means of the levers on the top of the shell aging with the cover. The device is easily handled and controlled and repairs may be made with the minimum amount of trouble.

Having thus what I claim is 1. In a charcoal burner, an outer shell, a cover therefor, a magazine within the shell, a cylindrical guide depending from the magazine, a perforated upper grate secured to and flaring outwardly from the bottom of the guide, a lower rate, a perforated cylindrical wall between t 1e lower and the upper grate and bolts secured to the upper grate and adapted to clamp the cylindrical wall between the lower and upper grates.

2. In a charcoal burner, an outer corruated shell, 8 cover therefor, a magazine, the otitom of which flares inwardly, a cylindrical guide depending from the bottom of the magazine, an upper grate secured to and flaring outwardly and downwardly from the gu1de,a conical lower grate, a perforated cylindrical wall between the said grates and described my invention,

bolts passing through the grates and clamping the cylindrical wall therebetween.

In a charcoal burner, a shell, a cover therefor, means for clamping the cover to the shell, a magazine having a conically shaped bottom, a cylindrical guide, a bottom grate of conical form, a perforated cylindrical wall between the grates, means passing through the edges of the grates to clamp the wall therebetween, and baffle means adapted to guide air through a tortuous path from the bottom of the shell through perforations near the top thereof.

4. A charcoal burner according to claim 3 having brackets extending from the side walls to support the upper grate and a bafile flaring upwardly and outwardly from the bottom of the guide and terminating in a flange spaced from the shell.

5. A charcoal burner comprising a shell, a cover therefor, means for clamping the cover to the shell, :1 magazine having a conically shaped bottom formed in the upper part of the shell, a cylindrical guide depending from the bottom of the magazine, a bafile secured to the bottom of the guide and flaring upwardly and outwardly therefrom, brackets secured to the shell and to the batlle, a perforated upper grate secured to the brackets and flaring outwardly and downwardly from the guide, a bottom grate of conical. form, a perforated cylindrical wall between the grates, bolts holding the grates so that the cylindrical wall is clamped therebetween a guide plate resting on the brackets, and perforations in the shell for the entry of air thereto and exit of air therefrom.

6. A charcoal burner according to claim 5 having a bottom supporting ring for the shell, a heat insulating disc above the ring, a bottom above said disc, an inverted frustoconically shaped air guide plate resting on the bottom and secured to the sides of the shell, said bottom and guide plate having perforations for guiding air into the burner, and means formed in the shell below the bottom to allow air to pass therethrough.

7. A charcoal burner comprising a corrugated shell, a cover therefor, clamping levers for the cover, a magazine formed in the upper part of the shell, said magazine having a conically shaped bottom, a cylindrical guide depending from the said bottom, a gate valve. for controlling the feed of charcoal from the magazine, a baffle flaring upwardly and outwardly from the guide, brackets secured to the shell and the baffle, an air guide plate secured to the brackets, an upper grate of conical form depending from the brackets, a lower conical grate, a perforated cylindrical wall resting on the bottom grate, means for clamping the cylindrical wall between the grates, a sliding fire door, a bottom positioned below the grates, a supporting ring for the shall, a heat insulating disc resting on the ring and spaced from the bottom, baffle guides between the bottom and the wall of the shell, said shell bottom and baffle guides having perforations for the passage of air into the burner and means formed in the shell above the upper baffle to allow heatecl air to pass out through the shell.

In Witness whereof, I have hereunto set my hand.

ALLAN M. MITCHELL. 

